K417G高温合金纳米氧化锆热障涂层的制备与性能  

Preparation and Properties of Nano-ZrO_2 Thermal Barrier Coating on K417G Superalloy

作　　者：吴静[1] 朱丽娟[1] 袁福河[2] 段绪海[2] 

机构地区：[1]沈阳理工大学材料科学与工程学院,沈阳110168 [2]沈阳黎明航空发动机(集团)有限责任公司,沈阳110043

出　　处：《中国表面工程》2006年第5期26-31,共6页China Surface Engineering

摘　　要：通过探讨喷涂工艺参数对纳米氧化锆涂层结构和性能影响的规律,使纳米氧化锆未熔颗粒基本上保持原始氧化锆粉末的纳米级晶粒大小,熔化的颗粒则起粘结剂的作用,使涂层内氧化锆颗粒间结合牢固,涂层结构致密。纳米氧化锆热障涂层与常规氧化锆涂层相比导热系数降低,隔热效果得到明显提高。力学试验结果则表明,纳米结构热障涂层在硬度、抗热冲击性能、耐冲击性以及结合强度等方面都明显高于常规粉末制备的涂层。The effects of plasma spraying parameters on the microstructures and properties of nanocrystalline yttria stabilized zirconia thermal barrier coating were studied. The nano-coating can retain ultrafine grain size of the nanocrystalline feedstock. The thermal insulation property of nano-zirconia coatings is excellent. The better performance of the nano-zirconia coatings is attributed to their compactness and good cohesion between the unmelted nano-zirconia particles by the well-melted zirconia particles as a binder. The test results of mechanical properties indicated that the nano-coatings possess higher hardness and bonding strength, as well as better thermal shock resistance.

关 键 词：等离子喷涂 热障涂层 氧化 结合强度 

分 类 号：TB383[一般工业技术—材料科学与工程]